66 lines
2.0 KiB
Markdown
66 lines
2.0 KiB
Markdown
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# boost-helper-json
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A simple wrapper around `Boost.PropertyTree` for quick & dirty JSON access.
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## 1. Introduction
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If you're working with JSON on C++ and looking for a good library, I'd recommend [RapidJSON](http://rapidjson.org/) or [JSON for Modern C++](https://nlohmann.github.io/json/). They are fast and scalable, and provide loads of useful functionalities.
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However, if you're just looking for a quick and dirty workaround, and happen to be using the Boost C++ libraries in your project, this may be an option for you.
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Just include the header, and start hacking with JSON.
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## 2. Example
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```c++
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#include "json.hpp"
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#include <iostream>
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#include <string>
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int main()
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{
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using namespace boost_helper;
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// Initialize JSON with a string.
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json response(R"({"err":0,"data":{"msg":"ok","names":["John","Sarah"]}})");
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// Changing a node value with a string.
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response["data"]["msg"] = "confirmed";
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// Check whether this node has a child with the specified key.
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if (response.has("err"))
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{
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// Changing a node value with another JSON node.
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response["err"] = json(R"({"code":0,"status":"ok"})");
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}
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// Access child node value of a JSON.
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std::cout << "Now message becomes \"" << response["data"]["msg"].val() << '"' << std::endl;
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// Iterate through a JSON node.
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for (const auto& name : response["data"]["names"])
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{
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std::cout << name.second.val() << " said hello!" << std::endl;
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}
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// Iterate througth a JSON node and change its children's values.
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for (auto name : response["data"]["names"])
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{
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name.second = "Nobody";
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}
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// Compare a JSON node with another node.
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if (response["data"]["names"] == json(R"(["Nobody","Nobody"])"))
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{
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// Add a child string to a JSON node without key.
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response["data"]["names"].add("Somebody");
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}
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// Add a child node to a JSON node without key.
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response["data"]["names"].add(json(R"(["Paul","Joshua"])"));
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// Print a JSON node.
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std::cout << response.to_string() << std::endl;
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}
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```
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